A torpedo guidance method using sound waves emitted by a target to determine its location and trajectory.

A guided bomb is a munition that uses a guidance system to modify its flight path in real-time to ensure accuracy.

A watercraft capable of independent operation underwater, primarily used for naval warfare, research, or exploration.

Designation for intercontinental ballistic missiles (ICBMs) deployed and launched from submerged submarines.

A torpedo guidance method that homes in on the wake or trail left by a moving target, typically a ship.

Missile guidance system where commands are transmitted via a physical wire link between the launch point and the missile during flight.